CN112848544B - Fiber metal laminated plate and preparation method thereof - Google Patents
Fiber metal laminated plate and preparation method thereof Download PDFInfo
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- CN112848544B CN112848544B CN202110048494.0A CN202110048494A CN112848544B CN 112848544 B CN112848544 B CN 112848544B CN 202110048494 A CN202110048494 A CN 202110048494A CN 112848544 B CN112848544 B CN 112848544B
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- 239000000835 fiber Substances 0.000 title claims abstract description 274
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 217
- 239000002184 metal Substances 0.000 title claims abstract description 217
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000010410 layer Substances 0.000 claims abstract description 182
- 239000004744 fabric Substances 0.000 claims abstract description 162
- 229920005989 resin Polymers 0.000 claims abstract description 60
- 239000011347 resin Substances 0.000 claims abstract description 60
- 239000012790 adhesive layer Substances 0.000 claims abstract description 15
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 22
- 239000004917 carbon fiber Substances 0.000 claims description 22
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 15
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- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000003085 diluting agent Substances 0.000 claims description 8
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- 239000003822 epoxy resin Substances 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- UWFRVQVNYNPBEF-UHFFFAOYSA-N 1-(2,4-dimethylphenyl)propan-1-one Chemical compound CCC(=O)C1=CC=C(C)C=C1C UWFRVQVNYNPBEF-UHFFFAOYSA-N 0.000 claims description 4
- YSUQLAYJZDEMOT-UHFFFAOYSA-N 2-(butoxymethyl)oxirane Chemical compound CCCCOCC1CO1 YSUQLAYJZDEMOT-UHFFFAOYSA-N 0.000 claims description 4
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 4
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- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
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Images
Classifications
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- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/02—Layer formed of wires, e.g. mesh
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
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- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- B32B2262/10—Inorganic fibres
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Organic Chemistry (AREA)
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Abstract
The invention relates to a fiber metal laminated plate and a preparation method thereof, wherein the fiber metal laminated plate comprises a first fiber cloth layer and two layers of metal nets which are respectively arranged at two sides of the first fiber cloth layer, and the first fiber cloth layer comprises at least one layer of fiber cloth; the metal net is characterized by also comprising chopped fibers, wherein the chopped fibers can be attached to the surface of the metal net and form a burr structure on the surface of the metal net; a resin adhesive layer is arranged between the metal net and the first fiber cloth layer. The fiber metal laminated plate has good conductivity, can ensure that each layer is tightly attached, can avoid the problems of long surge overvoltage release time and energy gathering caused by poor conductivity of a vehicle body prepared by the fiber metal laminated plate, ensures the safety of personnel and equipment in the vehicle, and has lower cost.
Description
Technical Field
The invention relates to the technical field of fiber metal lamination, in particular to a fiber metal laminated plate and a preparation method thereof.
Background
Carbon fiber composite materials have become one of the first choice materials for vehicle body design and manufacture by virtue of the characteristics of high strength, low expansion coefficient, small heat capacity, small specific gravity and the like. However, due to the influence of objective factors such as a composition mode, a forming process and the like, the electrical property of the metal car body is inferior to that of a traditional metal car body, and therefore the problems of long car body surge overvoltage discharge time and energy accumulation are caused.
Aiming at the problem, the existing common solution is to add a metal net on the outer layer of the carbon fiber car body, the method can solve the problem of discharging surge overvoltage to a certain extent, but the surface of the outer layer metal net is uneven and is easily corroded and oxidized by the environment, other processes are needed to further treat the outermost layer structure, the electrical property of the single-layer metal net to the material is improved to a limited extent, and the problems of high ground potential and long discharging time of car body overvoltage to some extreme working conditions such as high-voltage circuit breaking, contact network disconnection, direct lightning and the like still exist.
There is also a similar method to compound a metal mesh layer into a carbon fiber material, which can avoid the metal mesh from being exposed, but besides the limited improvement of electrical properties, the adhesion between the metal mesh and the carbon fiber layer is also general, and the problems of interlayer separation and material damage are easy to occur. In another method, a certain processing technology is utilized to combine the conductive filler with the carbon fiber matrix, the conductive function of the composite material is realized by the conductivity of the filler, and common fillers comprise carbon nano tubes, graphite, metal powder and the like. The method has the advantages of simple process, easy processing, low cost and wide application range, but the electrical property of the composite material mainly depends on the addition proportion of the conductive filler, and the excessive addition can influence the mechanical property of the composite material.
At present, a chemical process is used to metalize the surface of the carbon fiber composite material, and a reducing agent is used to reduce metal ions in a solution to form a metal coating on the surface of the carbon fiber composite material. The metal coating produced by the method has smooth and flat surface, uniform thickness and easy control, but has higher cost, is usually used in the occasions with complex shapes and high size requirements, and is not suitable for popularization and use in the field of manufacturing motor car bodies.
Therefore, how to provide a fiber metal laminate, when having good electric conductivity, can guarantee that each layer laminating is inseparable for the automobile body through this fiber metal laminate preparation can avoid the problem that surge overvoltage that causes because the electric conductivity is discharged for a long time, the energy gathering, has guaranteed the security of personnel and equipment in the automobile, and the cost is lower, is the technical problem that technical staff in the field need solve.
Disclosure of Invention
The invention aims to provide a fiber metal laminated plate and a preparation method thereof, wherein the fiber metal laminated plate has good conductivity and can ensure that each layer is tightly attached, so that a vehicle body prepared by the fiber metal laminated plate can avoid the problems of long surge overvoltage release time and energy accumulation caused by poor conductivity, the safety of personnel and equipment in the vehicle is ensured, and the cost is lower.
In order to solve the technical problem, the invention provides a fiber metal laminate, which comprises a first fiber cloth layer and two layers of metal nets respectively arranged at two sides of the first fiber cloth layer, wherein the first fiber cloth layer comprises at least one layer of fiber cloth; the metal net is characterized by also comprising chopped fibers, wherein the chopped fibers can be attached to the surface of the metal net and form a burr structure on the surface of the metal net; and a resin adhesive layer is arranged between the metal net and the first fiber cloth layer.
The surfaces of the two layers of metal nets are attached with chopped fibers, the chopped fibers can form burr structures on the surfaces of the metal nets, when the surfaces of the metal nets are bonded and fixed with the first fiber cloth layer through the resin glue layer, the chopped fibers can penetrate through the resin glue layer to be in contact with fiber filaments in the first fiber cloth layer and are fixed through the resin glue layer, and therefore the bonding strength between the metal nets and the first fiber cloth layer can be increased, the bonding stability between the metal nets and the first fiber cloth layer is ensured, the situation of laminating separation is avoided, and the mechanical property of the fiber metal laminated plate is improved.
The structural strength of the fiber metal laminated plate can be guaranteed by the aid of the first fiber cloth layer, the fiber metal laminated plate has electric conductivity due to arrangement of the metal net, the number of the metal net is two, the electric conductivity of the fiber metal laminated plate can be further guaranteed, when a motor car body is manufactured through the fiber metal laminated plate, the car body can be guaranteed to have good shielding performance, the problems that surge overvoltage leakage time of the car body is long due to poor electric conductivity of a fiber composite material and energy is gathered are avoided, safety of personnel and equipment in the car is guaranteed, meanwhile, a burr structure formed on the surface of the metal net by the chopped fibers can penetrate through a resin glue layer to be in contact with fibers in the first fiber cloth layer, accordingly, bonding strength between the metal net and the first fiber cloth layer can be increased, bonding stability between the metal net and the first fiber cloth layer is guaranteed, laminating separation is avoided, and mechanical performance of the fiber metal laminated plate is further improved.
Optionally, one side of each of the two metal nets, which is far away from the first fiber cloth layer, is provided with a second fiber cloth layer, and a resin adhesive layer is arranged between each of the metal nets and each of the second fiber cloth layers; the second fiber cloth layer comprises at least one layer of fiber cloth.
Optionally, the metal mesh is a copper mesh;
and/or the chopped fibers are carbon fibers, and the fiber cloth is carbon fiber cloth.
Optionally, the mesh number of the metal mesh is 100-200, and the thickness is 0.08-0.2 mm.
The invention also provides a preparation method of the fiber metal laminated plate, which comprises the following steps:
s1: preparing two layers of metal nets, forming a burr structure on the surface of each metal net through chopped fibers, and preparing resin glue at the same time;
s2: spraying a release agent on the mould, placing an isolation cloth, and laying a layer of metal mesh with a burr structure formed on the surface;
s3: smearing the resin adhesive on the surface of the metal net laid in the step S2, and laying fiber cloth to form a first fiber cloth layer;
s4: smearing the resin adhesive on the surface of the first fiber cloth layer, and laying a metal net with a burr structure on the surface of the other layer;
s5: and (4) after die assembly, vacuumizing, putting the die into a hot press for hot-pressing solidification, cooling to room temperature, and demoulding.
The two layers of metal nets with the burr structures formed on the surfaces, prepared in the step S1, are laid in the step S2 and the step S4 respectively, and are located on two sides of the first fiber cloth layer respectively, wherein the structural strength of the fiber metal laminated plate can be guaranteed through the arrangement of the first fiber cloth layer, the fiber metal laminated plate has good electrical conductivity through the arrangement of the two layers of metal nets, when a motor car body is prepared through the fiber metal laminated plate, the good shielding performance of the motor car body can be guaranteed, the problems that the overvoltage release time of the motor car body is long and energy is gathered due to poor electrical conductivity of a fiber composite material are avoided, and the safety of personnel and equipment in the motor car is guaranteed. Meanwhile, after the surface of the metal net is in a burr structure formed by the chopped fibers, the metal net is bonded and fixed with the first fiber cloth layer through the resin adhesive, and at the moment, the chopped fibers can penetrate through the resin adhesive layer to be contacted with the fibers in the first fiber cloth layer, so that the bonding strength between the metal net and the first fiber cloth layer can be increased, the bonding stability between the metal net and the first fiber cloth layer is ensured, the laminating separation is avoided, and the mechanical property of the fiber metal laminated plate is further improved.
Optionally, step S2 specifically includes: spraying a release agent on the mould, placing an isolation cloth, laying a fiber cloth to form a second fiber cloth layer, then coating the resin adhesive on the surface of the second fiber cloth layer, and laying a metal net with a burr structure on the surface;
between step S4 and step S5, step S41 is further included:
and (5) coating the resin adhesive on the surface of the metal mesh laid in the step (S4), and laying the fiber cloth to form a second fiber cloth layer.
Optionally, in step S1, the preparing two layers of expanded metal specifically includes: the method comprises the steps of coating chopped fiber powder on the surface of a metal net, enabling chopped fiber short filaments to penetrate through meshes of the metal net in a rubbing mode to form a burr structure on the surface of the metal net, and then cleaning away redundant chopped fiber powder on the surface of the metal net.
Optionally, in step S1, before applying chopped fibers on the surface of the metal mesh to form a burr structure, the surface of the metal mesh is wiped to remove oil stains.
Optionally, in step S5, the heating temperature of the hot press is set to 120 ℃, the heating rate is set to 4 ℃, the pressure is set to 10MPa, and the heating time is set to 2 hours.
Optionally, in step S1, the preparing the resin glue includes: and sequentially adding an epoxy resin system, an unsaturated resin system and an internal release agent according to the preset mass percentage, stirring for a first preset time by a stirrer, adding a toughening agent and an active diluent, and stirring for a second preset time by the stirrer to obtain the resin adhesive.
Optionally, the preset mass percentage is (8-12): and (4-6) 1, wherein the first preset time is 5-10 min, and the second preset time is 5-10 min.
Optionally, the toughening agent comprises at least one of polyethylene glycol glycidyl ether, carboxyl-terminated liquid nitrile rubber and polyurethane; the reactive diluent comprises at least one of 1, 4-butyrolactone, butyl glycidyl ether and ethylene glycol diglycidyl ether.
Drawings
Fig. 1 is a schematic structural view of a fiber metal laminate provided by an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a fiber metal laminate;
FIG. 3 is a schematic structural view of a metal mesh and chopped fibers;
fig. 4 is a block flow diagram of a method of making a fiber metal laminate provided by an embodiment of the present invention;
fig. 5 is a detailed flow diagram of a method of making a fiber metal laminate.
In the accompanying fig. 1-5, the reference numerals are illustrated as follows:
1-a first fibre cloth layer;
2-metal mesh, 21-mesh;
3-a second fiber cloth layer;
4-chopped fibers.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a fiber metal laminate and a preparation method of the fiber metal laminate, wherein as shown in fig. 1 and fig. 2, the fiber metal laminate comprises a first fiber cloth layer 1 and two metal nets 2, wherein the two metal nets 2 are respectively arranged on two sides of the first fiber cloth layer 1, the first fiber cloth layer 1 comprises at least one layer of fiber cloth, the fiber metal laminate further comprises chopped fibers 4, the chopped fibers 4 are attached to the surface of each layer of metal net 2 and can form a burr structure on the surface of the metal net 2, and a resin adhesive layer is arranged between the metal net 2 and the first fiber cloth layer 1, that is, the metal net 2 and the first fiber cloth layer 1 are fixed through the resin adhesive layer.
In detail, the chopped fibers 4 are attached to the surfaces of the two metal nets 2, as shown in fig. 3, the chopped fibers 4 can form a burr structure on the surface of the metal net 2, and when the surface of the metal net 2 is bonded and fixed with the first fiber cloth layer 1 through the resin adhesive layer, the chopped fibers 4 can penetrate through the resin adhesive layer to contact with the fiber filaments in the first fiber cloth layer 1 and are fixed through the resin adhesive layer, so that the bonding strength between the metal net 2 and the first fiber cloth layer 1 can be increased, the bonding stability between the two layers is ensured, the lamination and separation are avoided, and the mechanical performance of the fiber metal laminated plate is improved.
The structural strength of the fiber metal laminated plate can be guaranteed by the arrangement of the first fiber cloth layer 1, the fiber metal laminated plate has conductivity by the arrangement of the metal net 2, in the embodiment, the number of the metal nets 2 is two, the conductivity of the fiber metal laminated plate can be further guaranteed, when a motor car body is prepared by the fiber metal laminated plate, the car body can be guaranteed to have better shielding performance, the problems of long surge overvoltage release time and energy gathering caused by poor conductivity of a fiber composite material are avoided, the safety of personnel and equipment in the car is guaranteed, meanwhile, a burr structure formed on the surface of the metal net 2 by the chopped fibers 4 can penetrate through the resin glue layer to be in contact with fibers in the first fiber cloth layer 1, therefore, the bonding strength between the metal net 2 and the first fiber cloth layer 1 can be increased, the bonding stability between the metal net 2 and the first fiber cloth layer 1 is guaranteed, the condition of lamination separation is avoided, and the mechanical property of the fiber metal laminated plate is further improved.
In the above embodiment, the fiber metal laminate further includes two second fiber cloth layers 3, the two second fiber cloth layers 3 are respectively located on one side of the two metal nets 2 away from the first fiber cloth layer 1, that is, the fiber metal laminate includes the second fiber cloth layer 3, the metal net 2 and the first fiber cloth layer 1 which are stacked from outside to inside, each metal net 2 is sandwiched between the first fiber cloth layer 1 and the second fiber cloth layer 3, and the surface of each metal net 2 is provided with a burr structure formed by the chopped fibers 4, so that the bonding strength between each metal net 2 and the fiber cloth layers (including the first fiber cloth layer 1 and the second fiber cloth layer 3) bonded thereto through the resin glue layer is ensured, and the lamination separation is avoided.
In addition, the second fiber cloth layer 3 is arranged on the outer side (far away from the first fiber cloth layer 1) of the metal net 2 for wrapping, so that the metal net 2 can be prevented from being corroded and oxidized in the environment, and the smoothness and the attractiveness of the outer surface of structures such as a vehicle body and the like prepared by the fiber metal laminated plate are ensured.
Specifically, in this embodiment, the specific number of carbon fiber cloth layers of the first fiber cloth layer 1 and the second fiber cloth layer 3 is not limited, for example, the first fiber cloth layer 1 may be provided with the number of carbon fiber cloth layers according to the specific thickness requirement of the fiber metal laminate, and the second fiber cloth layer 3 may be provided with only one fiber cloth layer to wrap the metal mesh 2 from the outer layer to prevent corrosion and the like. Of course, the number of layers of the fiber cloth of the first fiber cloth layer 1 and the second fiber cloth layer 3 may be the same, or may be different, or even the number of layers of the fiber cloth of the second fiber cloth layer 3 may be larger than the number of layers of the fiber cloth of the first fiber cloth layer 1, and the number of layers of the fiber cloth of the two second fiber cloth layers 3 may be the same or different, which is not limited herein.
In the above embodiment, the metal mesh 2 is a copper mesh, or the metal mesh 2 may be an aluminum mesh, an aluminum alloy mesh, or the like, and when the metal mesh 2 is selected as the copper mesh, good conductivity of the metal mesh 2 can be ensured. In this embodiment, chopped fiber 4 is the carbon fiber, and the fiber cloth is carbon fiber cloth, of course, also can all select glass fiber with chopped fiber 4 and fiber cloth for use, and because the carbon fiber silk in carbon fiber and the carbon fiber portion is electrically conductive, the burr structure on metal mesh 2 surface can be connected fixedly with the carbon fiber silk in the carbon fiber cloth, can further promote the electric conductivity of this fiber metal laminate, guarantees the shielding performance when preparing the automobile body through this fiber metal laminate.
In the above embodiment, the mesh number of the metal mesh 2 is 100 to 200, and the thickness is 0.08mm to 0.2mm, so as to ensure that the metal mesh 2 can exert good conductivity in the fiber metal laminate and ensure the overall structural strength.
In the above embodiment, the resin adhesive layer includes an epoxy resin system, an unsaturated resin system and an internal release agent, and the mass percentages of the epoxy resin system, the unsaturated resin system and the internal release agent are (8-12): and (4-6): 1 to ensure the bonding strength. The epoxy resin system and the unsaturated resin system are corresponding resin and curing agents thereof, and the unsaturated resin system is used for adjusting the viscosity of the resin and promoting the curing of the epoxy component by utilizing curing heat.
Furthermore, the resin adhesive layer also comprises a toughening agent and a reactive diluent, wherein the toughening agent comprises at least one of polyethylene glycol glycidyl ether, carboxyl-terminated liquid nitrile rubber and polyurethane, and the reactive diluent comprises at least one of 1, 4-butyrolactone, butyl glycidyl ether and ethylene glycol diglycidyl ether, so that the materials are flexible and the bonding strength can be ensured.
As shown in fig. 4, a method for manufacturing a fiber metal laminate according to an embodiment of the present invention includes the following steps:
s1: preparing two layers of metal nets 2, forming a burr structure on the surface of each metal net 2 through chopped fibers 4, and preparing resin glue at the same time;
s2: spraying a release agent on the mould, placing an isolation cloth, and laying a layer of metal net 2 with a burr structure formed on the surface;
s3: coating resin glue on the surface of the metal net 2 laid in the step S2, and laying fiber cloth to form a first fiber cloth layer 1;
s4: resin glue is smeared on the surface of the first fiber cloth layer 1, and a metal net 2 with a burr structure is formed on the surface of the other layer;
s5: and (4) after die assembly, vacuumizing, putting the die into a hot press for hot-pressing solidification, cooling to room temperature and demoulding.
Wherein, the setting of release agent and barrier cloth, the drawing of patterns operation in the later stage of being convenient for, specific mould includes mould and lower mould, goes up mould and lower mould and all need the spraying release agent and place the barrier cloth. In addition, the first fiber cloth layer 1 laid in step S3 may be formed by laying each layer of fiber cloth layer by layer, or may be formed by laying each layer of fiber cloth layer by layer in advance to form a preform, and in step S3, the preform may be entirely laid, which is not limited specifically herein.
The two layers of metal nets 2 (shown in fig. 3) with burr structures formed on the surfaces are prepared in the step S1 and are laid in the step S2 and the step S4 respectively, and the two layers of metal nets 2 are located on two sides of the first fiber cloth layer 1 respectively, wherein the structural strength of the fiber metal laminated plate can be guaranteed by the arrangement of the first fiber cloth layer 1, the fiber metal laminated plate has good conductivity due to the arrangement of the two layers of metal nets 2, when a motor car body is prepared through the fiber metal laminated plate, the good shielding performance of the body can be guaranteed, the problems that the surge overvoltage release time of the car body is long and energy is gathered due to the poor conductivity of a fiber composite material are avoided, and the safety of personnel and equipment in the car is guaranteed. Meanwhile, after the surface of the metal mesh 2 is in a burr structure formed by the chopped fibers 4, the metal mesh is bonded and fixed with the first fiber cloth layer 1 through the resin adhesive, and at the moment, the chopped fibers 4 can penetrate through the resin adhesive layer to be contacted with the fiber filaments in the first fiber cloth layer 1, so that the bonding strength between the metal mesh 2 and the first fiber cloth layer 1 can be increased, the bonding stability between the metal mesh and the first fiber cloth layer is ensured, the condition of lamination separation is avoided, and the mechanical property of the fiber metal laminated plate is further improved.
In the foregoing embodiment, as shown in fig. 5, the step S2 specifically includes: spraying a release agent on a mould, placing an isolation cloth, laying a fiber cloth to form a second fiber cloth layer 3, then coating the resin adhesive on the surface of the second fiber cloth layer 3, and laying a metal net 2 with a burr structure on the surface;
further, between step S4 and step S5, step S41 is further included:
the surface of the metal mesh 2 laid in step S4 is coated with a resin adhesive, and a fiber cloth is laid to form a second fiber cloth layer 3.
The fiber metal laminate further comprises two second fiber cloth layers 3, the two second fiber cloth layers 3 are respectively located on one side, far away from the first fiber cloth layer 1, of the two metal nets 2, namely the fiber metal laminate comprises the second fiber cloth layers 3, the metal nets 2 and the first fiber cloth layer 1 which are stacked from outside to inside, each metal net 2 is clamped between the first fiber cloth layer 1 and the second fiber cloth layer 3, and the surfaces of the two sides of each metal net 2 are provided with burr structures formed by the chopped fibers 4, so that the bonding strength between each metal net 2 and the fiber cloth layers (including the first fiber cloth layer 1 and the second fiber cloth layer 3) bonded with the metal nets through the resin glue layers is guaranteed, and the laminating separation is avoided.
In addition, because the second fiber cloth layer 3 is arranged on the outer side (the side far away from the first fiber cloth layer 1) of the metal net 2, the metal net 2 can be prevented from being corroded and oxidized in the environment, and the smoothness and the attractiveness of the outer surface of the structure such as a vehicle body prepared by the fiber metal laminated plate can be ensured.
Specifically, in this embodiment, the specific number of carbon fiber cloth layers of the first fiber cloth layer 1 and the second fiber cloth layer 3 is not limited, for example, the first fiber cloth layer 1 may be provided with the number of carbon fiber cloth layers according to the specific thickness requirement of the fiber metal laminate, and the second fiber cloth layer 3 may be provided with only one fiber cloth layer to wrap the metal mesh 2 from the outer layer to prevent corrosion and the like. Of course, the number of layers of the fiber cloth of the first fiber cloth layer 1 and the second fiber cloth layer 3 may be the same, or may be different, or even the number of layers of the fiber cloth of the second fiber cloth layer 3 may be larger than the number of layers of the fiber cloth of the first fiber cloth layer 1, and the number of layers of the fiber cloth of the two second fiber cloth layers 3 may be the same or different, which is not limited herein.
In the above embodiment, in the step S1, the preparing two layers of metal mesh 2 specifically includes: the chopped fiber powder is coated on the surface of the metal mesh 2, short filaments of the chopped fibers 4 pass through meshes 21 of the metal mesh 2 in a rubbing mode, a burr structure shown in figure 3 is formed on the surface of the metal mesh 2, and then the redundant chopped fiber powder on the surface of the metal mesh 2 is cleaned for later use. Of course, the present embodiment is not limited to how the chopped fibers 4 form the burr structure on the surface of the metal mesh 2, and the operation process can be simplified when the fiber filaments of the chopped fibers 4 form the burr structure on the surface of the metal mesh 2 by rubbing.
In the above embodiment, when preparing the metal mesh 2, before applying the chopped fibers 4 on the surface of the metal mesh 2 to form the burr structure, the surface of the metal mesh 2 is wiped to remove oil stains on the surface of the metal mesh 2, so as to ensure that the surface of the metal mesh 2 is clean, and to ensure that the fiber filaments of the chopped fibers 4 are attached to the surface of the metal mesh 2.
In the above embodiment, after each layer of metal mesh 2 and each layer of fiber cloth are laid, the surface thereof is rolled by rollers to ensure the surface to be flat and avoid wrinkles.
In the above embodiment, in step S5, the heating temperature of the hot press is set to 120 ℃, the heating rate is set to 4 ℃, the pressure is set to 10MPa, and the heating time is set to 2 hours.
In step S1, preparing the resin adhesive includes: and sequentially adding the epoxy resin system, the unsaturated resin system and the internal release agent according to a preset mass percentage, stirring for a first preset time by a stirrer, adding the toughening agent and the reactive diluent, and stirring for a second preset time by the stirrer to obtain the resin adhesive. The epoxy resin system and the unsaturated resin system are corresponding resins and curing agents thereof, and the unsaturated resin has the functions of adjusting the viscosity of the resins and promoting the curing of the epoxy components by utilizing curing heat. Specifically, the preset mass percentage is (8-12): (4-6) 1 (such as 10: 5: 1), the first preset time is 5-10 min, the second preset time is 5-10 min, and the toughening agent is any one or the combination of polyethylene glycol glycidyl ether, carboxyl-terminated liquid nitrile rubber and polyurethane; the reactive diluent is any one or combination of 1, 4-butyrolactone, butyl glycidyl ether and ethylene glycol diglycidyl ether, so as to ensure the bonding strength of the resin adhesive.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (12)
1. The fiber metal laminated board is characterized by comprising a first fiber cloth layer (1) and two layers of metal nets (2) which are respectively arranged on two sides of the first fiber cloth layer (1), wherein the first fiber cloth layer (1) comprises at least one layer of fiber cloth;
the metal net is characterized by also comprising chopped fibers (4), wherein short wires of the chopped fibers (4) penetrate through meshes of the metal net (2) in a rubbing mode and form a burr structure on the surface of the metal net (2);
a resin adhesive layer is arranged between the metal net (2) and the first fiber cloth layer (1);
the chopped fibers can penetrate through the resin adhesive layer to be in contact with the fiber filaments in the first fiber cloth layer and are fixed through the resin adhesive layer.
2. The fiber metal laminate according to claim 1, wherein a second fiber cloth layer (3) is respectively provided on one side of the two metal nets (2) away from the first fiber cloth layer (1), and a resin glue layer is provided between the metal nets (2) and the second fiber cloth layer (3);
the second fiber cloth layer (3) comprises at least one layer of the fiber cloth.
3. Fiber metal laminate according to claim 1 or 2, wherein the metal mesh (2) is a copper mesh;
and/or the chopped fibers (4) are carbon fibers, and the fiber cloth is carbon fiber cloth.
4. The fiber metal laminate according to claim 1 or 2, wherein the mesh number of the metal mesh (2) is 100 to 200, and the thickness is 0.08mm to 0.2mm.
5. A method for producing a fiber metal laminate sheet for producing the fiber metal laminate sheet according to claim 1, comprising the steps of:
s1: preparing two layers of metal nets, enabling the short chopped fiber short filaments to penetrate through meshes of the metal nets in a rubbing mode, forming a burr structure on the surfaces of the metal nets, and preparing resin glue;
s2: spraying a release agent on the mould, placing an isolation cloth, and laying a layer of metal mesh with a burr structure formed on the surface;
s3: smearing the resin adhesive on the surface of the metal net laid in the step S2, and laying fiber cloth to form a first fiber cloth layer;
s4: smearing the resin adhesive on the surface of the first fiber cloth layer, and laying a metal net with a burr structure on the surface of the other layer;
s5: and (4) after die assembly, vacuumizing, putting the die into a hot press for hot-pressing solidification, cooling to room temperature and demoulding.
6. The method of manufacturing a fiber metal laminate according to claim 5, wherein step S2 comprises in particular: spraying a release agent on the mould, placing an isolation cloth, laying a fiber cloth to form a second fiber cloth layer, then coating the resin adhesive on the surface of the second fiber cloth layer, and laying a metal net with a burr structure on the surface;
between step S4 and step S5, step S41 is further included:
and (5) coating the resin adhesive on the surface of the metal mesh laid in the step (S4), and laying the fiber cloth to form a second fiber cloth layer.
7. The method of manufacturing a fiber metal laminate according to claim 5 or 6, wherein the step S1 of preparing a two-layer metal mesh specifically comprises: the method comprises the steps of coating chopped fiber powder on the surface of a metal net, enabling chopped fiber short filaments to penetrate through meshes of the metal net in a rubbing mode to form a burr structure on the surface of the metal net, and then cleaning away redundant chopped fiber powder on the surface of the metal net.
8. The method of manufacturing a fiber metal laminate according to claim 5 or 6, wherein in step S1, the surface of the metal mesh is wiped to remove oil stains before applying chopped fibers on the surface of the metal mesh to form a burred structure.
9. The method of manufacturing a fiber metal laminate according to claim 5 or 6, wherein after the laying of the metal mesh and the fiber cloth, rolling is performed by rollers, respectively.
10. The method of manufacturing a fiber metal laminate according to claim 5 or 6, wherein in step S1, the preparing a resin glue comprises: and sequentially adding an epoxy resin system, an unsaturated resin system and an internal release agent according to a preset mass percentage, stirring for a first preset time by a stirrer, adding a toughening agent and an active diluent, and stirring for a second preset time by the stirrer to obtain the resin adhesive.
11. The method for manufacturing a fiber metal laminate board according to claim 10, wherein the preset mass percentages are (8 to 12): and (4) 1), wherein the first preset time is 5-10 min, and the second preset time is 5-10 min.
12. The method of manufacturing a fiber metal laminate panel according to claim 10, wherein said toughening agent comprises at least one of polyethylene glycol glycidyl ether, carboxyl-terminated liquid nitrile rubber, and polyurethane; the reactive diluent comprises at least one of 1, 4-butyrolactone, butyl glycidyl ether and ethylene glycol diglycidyl ether.
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| CN102019656B (en) * | 2009-09-11 | 2015-03-25 | 固瑞特模具（太仓）有限公司 | Laminated plate for composite die and composite die |
| CN102991009B (en) * | 2012-11-16 | 2015-02-11 | 中国航空工业集团公司北京航空材料研究院 | Interlayer toughening carbon fiber-metal layer plywood |
| CN105522788B (en) * | 2014-11-24 | 2017-11-21 | 比亚迪股份有限公司 | A kind of fibre metal laminate and preparation method thereof |
| CN106696392A (en) * | 2015-07-27 | 2017-05-24 | 比亚迪股份有限公司 | Fiber metal laminated plate and preparation method thereof |
| CN106696394A (en) * | 2015-07-27 | 2017-05-24 | 比亚迪股份有限公司 | Fiber and metal laminated plate and preparation method thereof |
| JP2020083931A (en) * | 2018-11-16 | 2020-06-04 | 利昌工業株式会社 | Resin composition, prepreg, and, laminate sheet |
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